Lethal Influence of Zinc Exposure to Clarias gariepinus (Burchell, 1822, Pisces, Clariidae)
Journal Title: Journal of Animal Science Advances - Year 2012, Vol 2, Issue 1
Abstract
Acute toxicity of zinc (ZnSO4.7H2O) on Clarias gariepinus (Burchell, 1822) was investigated using toxicity scale of 96hrLC50 values and the quantal response determined by the statistical Probit Analysis Method. Fish species displayed different mortality responses to the varying concentrations of zinc studied (50, 60, 70, 80, 100 and 120mg/l) 96-hour LC50 value for Clarias gariepinus was revealed to be 78.178mg/l. The lower and upper confidence limits for the LC50 were 86.313mg/l and 71.035mg/l, respectively. While asserting the fact that zinc is an important constituent in municipal wastes discharged into freshwater and marine, there is clear indication from our results of the necessity to control the use of this metal. Further toxicity testing approaches on fish will be very useful in assessing possible ecological risk of heavy metals.
Authors and Affiliations
C. D. Ezeonyejiaku , M. O. Obiakor , C. O. Ezenwelu
Keywords
Related Articles
- EP ID EP97748
- DOI -
- Views 188
- Downloads 0
Characterization of Sperm Cell Motility Rate of Southern African Indigenous Cockerel Semen following Analysis by Sperm Class Analyser
The Sperm Class Analyser (SCA) system (CASA) is advantageous and provides precise additional information that cannot be attained through the subjective manual sperm cell assessmentmethods. The aim of the study was to cha...
Genetic Parameters Estimation and Trends for Birth Weight in Cattle
In this study data on birth weight (BWT) of local Tuli calves collected from 1988- 1997 at Matopos Research Station, located in Bulawayo, Zimbabwe were analyzed. A single trait animal model was fitted allowing for geneti...
Estimation of Variance Components by Sex, Theoretical Expectation and Selection Implication for Weaning Weight in Indigenous Tuli Cattle of Zimbabwe
Weights of males and females in cattle can be considered to be correlated traits with different averages and variances. Pedigree records of weaning weight (WWT) (4090) composed of 1969 males and 2121 females born between...
Bottleneck Analysis and Microsatellite Based Genetic Diversity in Najdi Goat Population
Assessing genetic biodiversity and population structure of minor populations through the information provided by neutral molecular markers, allows determination of their extinction risk and to design strategies for their...
Cardiac Biomarkers ACE, ANP and hs-CRP in New Zealand White Rabbits Used for Cardiovascular Research
Cardiac biomarkers have been employed for clinical and experimental heart disease evaluation. However, several laboratory assays for the evaluation of these biomarkers are available but there is no confluence of results...